Skiving tool



Nov. 17, 1959 P. E. WILLIAMS 2,912,843

. SKIVING I0OL Filed April 17, 1959 2 Sheets-Sheet l INVENTOR.

Nov. 17, 1959 P. E. WILLIAMS 2,912,843

SKIVING TOOL Filed April 17, 1959 2 Sheets-Sheet 2 INVIENTOR. @ML 6. BYS2 ATTORNEY United States Patent SKIVlNG TOOL Application April 17,1959, Serial No. 807,137

Claims. (Cl. 69-20) This invention relates to hand-supported andmanipulated, power-driven, cutting machines and more particularly to ahand-supported and manipulated power-driven, leather skiving machine.

In the conventional commercial processing and fabrication of leathergoods, the cutting and skiving of the leather is usually effected onlarge, floor-mounted cutting and skiving machines. This normallynecessitates the removal of the leather from the work table over to theskiving machine and back again to the work table. 1 Such machines aresuitable only for large quantity production of skived sheets whereineach of a large number is skived in like fashion, but are unsuitable forthe individual craftsman whose products vary in configuration one fromthe other so each must be skived in accordance with a different artisticconfiguration or design.

Such individualized skiving operations are presently effected with asimple knife or small skiving plane, similar to a carpenters plane, theeffective use of each of which is very difiicult, requiring considerableskill and care, and the expenditure of an exorbitant amount of time.

It is an object of the present invention to provide a portable,hand-supported and manipulated, power-driven cutting and skiving tool bywhich an operator may quickly and simply skive leather and likematerials regardless of the irregularity of the margin required thereon.

A further object of the invention is to provide a portable,power-operated, leather skiving tool that is light in weight, efiicientin operation, and simple and durable in construction.

A more specific object is to provide a hand-manipulated, skiving toolhaving adjustable guides so arranged that margins of the stock can belevelled accurately at preselected angles to the plane of the stock.

Briefly, the foregoing objects are accomplished by the provision of aportable power-operated skiving tool in cluding a power-driven,reciprocating skiving blade and coating guide plate, both of which aremounted on a casing which functions as a handle and contains a motorwhich effects the reciprocation of theskiving blade, for example, acasing and motor such as used in conventional electric hair clippers.The guide plate or surface is adjustable angled and in face to facespaced relation to the skiving blade in a predetermined manner wherebythe leather may be fed into the blade at the proper angle and depth forskiving purposes. An adjustable guide or hold-down bar may be providedat the forward edge of the guide surface to retain the leatherrelatively firmly against such surface as the leather is being fed intothe blade. With this construction, a portable, light-weight,electric-powered, hand skiving tool is provided that may be easilymanipulated to skive efiiciently and rapidly substantially any shapemargin that may be required.

Other objects and advantages of the invention will become apparent fromthe following description taken in conjunction with the drawings, inwhich:

- Fig. 1 is an exploded perspective view of a hand ice 2 skiving tool ofthe present invention, andshowing the relative position of the partsthereof prior to assembly;

Fig. 2 is a perspective view of the tool shown in 'Fig. 1, but showingthe parts assembled; I

Fig. 3 is a right side elevation of the guide plate, when viewed fromthe front or left in Fig. 1; s

Fig. 4 is a front elevation of the guide plate shown in Fig. 3, andshowing the coating cuttingblade in normal skiving position thereabove;

Fig. 5 is a left side elevation of the guide plate shown in Fig. 3; g iv Fig. 6 is a front elevation view of theguide bar;

Fig. 7 is a top plan view of the skiving blade; and d Fig. 8 is amodification of the guide bar shown in Fig. 6.

Although the invention is shown and described herein as being used forskiving and cutting leather, it will be understood that it may beemployed for skiving and'cutting any type .of resilient orpliablematerial such as rubber, cloth, cardboard, and other elastomericmaterials, etc.

Referring to Fig. 1, there is shown a conventional combined handle andmotor casing 10 of thetype commonly used in electric hair clippers,such, for example, as illustrated in the United States Patent No.2,265,880, issued December 4, 1941.. The casing 10 functions as a handlefor the skiving mechanism, later to be described. The casing 10 containsthe usual power-operated means in the form of an electric motor 11which, in the illustrative example, is ofv the vibratingtype. The motoris connected to the driving tongue or tang 12 and functions in thenormal manner to reciprocate the tang 12 transversely with respect tothe casing 10. Suitable means may be provided in the casing 10 forvarying the stroke of the tang 12, such means forming 'no part ofthepresent invention. I i

Secured to the forward or driving end of the casing 10 is a means forreciprocablysupporting a blade carrier 13 which is mounted forreciprocation endwise ina sta-.

tionary support or base plate 14, having a groove or slot 16 facing thecasing and configured to receive the base portion 18 of the bladecarrier 13.. The base plate 14 may be secured to the casing 10 by anysuitable means as, for example, the bolts 22 which are passed throughthe apertures 23 in the plate and are reeeivedin the respective threadedapertures 24 in the casing 10. The blade carrier 13 contains alongitudinal groove or slot 26 configured to receive the tang 12 indriving relation therein for reciprocating the carrier 13 endwise. Theblade carrier 13 includes a blade holding portion 27 which extendsendwise of the path of reciprocation and transversely or laterally ofthe casing 10. Areplaceable cutting or skiving blade 28 having a cuttingedge 29 is detachably secured to the blade holding portion 27 of thecarrier 13 by means of the screws30 which pass through the apertures 31in the blade and thence into the respective threaded apertures in thestuds 32. Although the cutting means is shown and described herein asthe blade carrier 13 including its replaceable blade 28, it

will be understood that such cutting means may be a single one-pieceblade extending transversely of the casing 10 and having a base portionwith a slot adapted to receive the tang 12 in the manner aforedescribed.Any suitable type of blade may be used, saw-tooth or otherwise,depending on the material to be cut or skived.

Additionally, although the blade 28 shown herein has the configurationof a trapezoid, any suitable configured blade may be employed that willadequately skive or cut the leather.

Extending outwardly from the base plate 14 is a guide plate 40 whichfunctions to support and guide. the leather at a proper positionflatwise, and at a proper angle endwise, of blade 28 for skivingpurposes. The guide plate contains a pair of apertured, spaced mountinglugs 42 and 43 at one side and which are receivable in undercut portions45 and 46, respectively, of the base plate 14. The lugs are hingedlysecured to the base plate 14 by means of the retaining bolts 48 and 49,respectively. The top surface 50 of the guide plate 40 slopes downwardlyand laterally outwardly from the handle, and thus outwardly laterally ofthe cutting path, thereby forming an angle a with the blade '28, asshown in Fig. 4. Such angle a may be adjusted by rotating the guideplate 40 about its hinged mounting aforedescribed to a preselected anglewith respect to the blade and retained at such angle by tightening a setscrew 53 which passes through the aperture 54 and bears against thesurface 55 of the undercut portion 46. With this construction, theskiving angle may be adjusted to provide any preselected slope of theskived margin as the particular design in question requires. Thus, theguide plate underlies the blade in spaced face to face relation theretowith the guide surface 50 of the plate being exposed toward the bladeand diverging therefrom endwise of the cutting edge.

To facilitate the passage of the leather over the guide plate 40 afterthe leather passes the cutting edge 29 of the blade 28 in the directionof travel, the rear portion 56 of the surface 51} is sloped downwardlyrearwardly and laterally in the manner shown in Figs. 1 and 3.

Although the base plate 14 and the guide plate 40 are shown anddescribed herein as separate components, it will be understood that suchbase plate and guide plate may be formed as a one-piece structure.

When leather is being cut or skived by the aforedescribed mechanism, itis essential that the leather be retained firmly against the surface 50as it is being fed into the reciprocating blade 28. To this end, a guidemember or hold-down bar 58 may be provided which is adjustably securedto the side 60 of the base plate as, for example, by the screws 62 and63 passing through the elongated slots 65 and 66, respectively, in theguide bar and into the respective apertures 68 and 69 in the base plateside 60. The hold-down portion 70 of the guide bar 58 is configured toprovide a straight-line contact with the upwardly exposed surface 50 ofthe leather supported on the surface in a direction endwise of theblade.

The plate 40 extends forwardly from the forward surface 60 of the baseplate 14 a distance represented by the letter d (Fig. 5) to enable suchcontact.

In practice, the leather is placed between the holddown portion 70 andthe surface 50, with the portion 70 being spaced from the surface 50 adistance slightly greater than the thickness of the leather.

An alternate form of hold-down bar is shown in Fig. 7 wherein thehold-down portion 72 thereof includes a roller 73 rotatively mounted inthe portion 72 longitudinally of the bar, as shown, whereby the rolleris adapted to hold the leather down on the surface 50 in the manneraforedescribed.

Thus, an efiicient, light-weight, portable, hand-supported,power-operated leather skiving tool is provided which may be employed byan inexperienced operator to accurately skive leather and like materialsof any conventional size and to any suitable configuration regardless ofthe irregularity of the margin requirements thereon.

The terms and expressions which have been employed are used as terms ofdescription, and not of limitation, and there is no intention, in theuse of such terms and expressions, of excluding any equivalents of thefeatures shown and described or portions thereof, but it is recognizedthat various modifications are possible within the scope of theinvention claimed.

Having thus described my' invention, I claim:

1. A hand skiving tool for skiving and cutting materials and comprisinga handle configured to be grasped manually for manipulating the tool, acutter blade, means carried by the handle and supporting the blade forreciprocation, power-operated means disposed in said handle anddrivingly connected to the blade for reciprocating the blade, and aguide plate carried by said handle and underlying said blade in spacedrelation thereto and having a guide surface exposed toward the blade anddiverging therefrom endwise of the cutting edge for guiding thematerials into engagement with the blade at a predetermined angle,endwise of the blade, to enable the blade to skive the materials.

2. A hand skiving tool for skiving and cutting leather comprising agenerally elongated handle configured to be grasped manually formanipulating the tool, a cutting blade, means carried by the handle andsupporting the blade substantially at one end of the handle forreciprocation transversely of the handle whereby a portion of the bladeextends substantially laterally outwardly from One side of the handle,power-operated means disposed in said handle and drivingly connected tothe blade for reciprocating the blade, and a guide plate secured to saidhandle and having a guide surface underlying said portion of the bladein spaced relation thereto and with the guide surface exposed towardsaid portion of the blade and diverging therefrom endwise of the cuttingedge for guiding the materials into said portion of the blade at apredetermined angle, endwise of the blade, to enable the blade to skivethe leather.

3. A hand skiving tool constructed in accordance with claim 2 whereinsaid guide surface diverges laterally of said portion of the blade in adirection toward the other end of the handle, said divergence commencingsubstantially adjacent said cutting edge of the blade.

4. A hand skiving tool constructed in accordance with claim 2 andincluding a guide member spaced from the guide surface and disposedadjacent said cutting edge in a direction outwardly of the one end ofthe handle for holding the leather against the guide surface.

5. A hand skiving tool constructed in accordance with claim 4 whereinadjusting means are provided to enable selective adjustment of thespacing of the guide member from the guide surface.

6. A hand skiving tool constructed in accordance with claim 2 whereinadjusting means are provided for adjusting the degree of divergence ofthe guide surface with respect to said portion of the blade.

7. A hand skiving tool for skiving and cutting leather comprising agenerally elongated handle configured to be grasped manually formanipulating the tool, a base plate mounted substantially at one end ofthe handle, said base plate having a groove formed in its surface facingsaid one end of the handle and extending transversely of the handle, acutter blade mounted for reciprocation in said groove and having aportion extending laterally outwardly from one side of the handle,poweroperated means disposed in said handle and connected to the bladefor reciprocating the blade, and a guide plate secured to said baseplate and having a guide surface underlying said portion of the blade inspaced relation thereto and with the guide surface exposed toward saidportion of the blade and diverging therefrom endwise of the cutting edgefor guiding the leather into said portion of the blade at apredetermined angle to enable the blade to skive the leather.

8. A hand skiving tool constructed in accordance with claim 7 whereinsaid guide plate is adjustably hinged to said base plate for adjustingthe degree of divergence of the guide surface with respect to saidportion of the blade.

9. A hand skiving tool for skiving and cutting leather comprising agenerally elongated handle configured to be grasped manually formanipulating the tool, a base plate mounted at one end of the handle,said base plate having a groove formed in its surface facing said oneend of the handle and extending transversely of the handle, a cutterblade holder mounted for reciprocation in said groove and having aportion extending laterally outwardly from one side of the handle, acutter blade detachably secured to said portion of the holder,power-operated means disposed in said handle and connected to the holderfor reciprocating the holder, and a guide plate adjustably secured tosaid base plate and having a guide surface underlying said blade andsaid portion of the holder in spaced relation thereto and with the guidesurface exposed toward said blade and diverging therefrom endwise of thecutting edge for guiding the leather into said blade at a predeterminedangle endwise of the blade to enable the blade to skive the leather.

10. A hand skiving tool constructed in accordance with claim 9 whereinsaid blade is adjustably secured to the portion of the holder to enablethe cutting edge of the blade to be selectively spaced from and angledwith respect to the guide surface.

References Cited in the file of this patent UNITED STATES PATENTS615,935 Weston Dec. 13, 1898 745,591 Furber Dec. 1, 1903 1,254,990 DaleyJan. 29, 1918 1,775,666 Borione Sept. 16, 1930 1,797,979 Griffith Mar.24, 1931 1,810,152 Volz June 16, 1931 1,964,829 Peterson et al. July 3,1934 2,265,880 Wahl Dec. 9, 1941 2,640,261 Wahl June 2, 1953 UNITEDSTATES PATENT CERTIFICATE OF OFFICE CORRECTION November 17 1959 Paul E.,Williams It is hereby certified th at error appears in the printedspecification of the above numbered patent r quiring correction and thatthe said Letters Patent should read as corrected below.

Column 1,, line 52 for "coating" 57 for "adjustable" read eoaeting for"coating" read read adjustably eolumn 2 line 8;

coasting Signed and sealed this 30th day of August 1960 (SEAL) Attest:

ERNEST W.; SWIDER ROBERT C. WATSON" Attesting Officer Commissioner ofPatents

